I move wood all year and use the dual wheel poly wheel barrels, but historically after a couple years they start to crack. The sun and cold really accelerate it and I’ve been sick of shelling out money to replace them, well maybe no more. I picked up some flex tape at BJ’s for cheep money and that stuff is amazing. Washed the poly good, let it dry, taped six sizable cracks both sides and running the tape over adjacent cracks. A month later it’s not only showing no signs of failure after a hard rain its holding water. If I had a boat, I’d definitely have a couple rolls on board for emergency repairs if I hit something or a thru hull fitting failed.